Support High and Low Side Power Switches.

[marsfan]

When looking at Sparkfun's documentation on the Artemis for information about the max source/sink current of the Artemis, I noticed that some of the Pads support a connection to a high (pads 3, 36) or low (pads 37, 41) side power switch for controlling higher currents without needing an external transistor (up to 50mA continuous or 150mA pulsed). This can be very useful for tasks such as driving an IR LED, which can require these higher currents.
While I personally can look through the HAL to implement it, not all Arduino users are well enough versed in C, and they would greatly benefit from a quick and accessible way to access this mode.

[paulvha]

just in case still needed for you or for others, there is a solution library for this on https://github.com/paulvha/apollo3/tree/master/APgpio